KONTAN.CO.ID - LONDON. London copper prices tumbled on Wednesday to their lowest level since March 2021, dragged down by a robust U.S. dollar and weaker financial markets as fears over a global economic slowdown dented investor sentiment. 

Three-month copper on the London Metal Exchange slipped 3% to $8,725.50 a tonne by 0718 GMT, after falling to its lowest since March 5, 2021 at $8,691. 

The most-traded July copper contract in Shanghai ended daytime trading 1.6% lower to 67,060 yuan ($9,971.60) a tonne.